PP groups frequently run much more "lean and mean" than employed groups. In a PP group, you can work harder/smarter and make more money/get more time off. When you're hospital-employed and the bottom line doesn't directly impact your income, you have less incentive to bust your butt. This has been demonstrated locally when a high-functioning PP group became employed by the hospital. Used to hump to get cases done and get the F out of the hospital with a nice paycheck. Hospital made the (incorrect) assumption they would get the same production from employed physicians, while making a profit off them. Tried to cut salaries/benefits/vacation. This did not pan out in their unpopular midwest location. After some attrition, they have found an equilibrium where they have to pay big bucks (like 650k) with good benefits/vacation (12 weeks) and low acuity (supervising 2 rooms) just to keep the place running. Anesthesia went from a no-cost department (contracted with the PP group) to a huge money pit for the hospital. This is going on about 10 years at this point.